Oil heater for permanent hair waving equipment



y 1933- A. e. JOHNSON 1,917,305

OIL HEATER FOR PERMANENT HAIR WAVING EQUIPMENT Filed March 21, 1952INVENTOR.

BY H- EJUHNBIJN m ATTORNEY.

Patented July 11, 1933 aver-ion e. JOHNSON, or ermuan, IOWA OIL F033,PERMANENT HAIR WAVING EQUIPMENT This invention relates to an oil heaterprimarily designed to be used in connection with the permanent wavingequipment similar to that illustrated in my Patent No. 1,846,338 underdate of February 23 1932 on a Device for permanently waving hair.

Therefore the principal object of my invention is to provide a portableelectric heater for successfully and quickly heating oil satiil uratedpermanent waving pads.

1 further object of this invention is to provide a heater for heatingoil saturated pads that maintains the pads at a predetermined uniformtemperature.

A still further ob'ect of my invention is to provide a heater forpermanent hair waving equipment that is sanitary and clean in use. i

A still further object of this invention is to provide an oil heater forpermanent hair waving equipment that economical in manufacture anddurable in use.

These and other objects will be apparent to those skilled in the art. Myinvention consists in the construction, arrangement and combination ofthe various parts of the device, whereby the objects contemplated areattained as hereinafter more fully set forth, pointed out in my claimsand illustrated in the accompanying drawing, in which:

Fig. 1 is a front view of my complete invention ready for use. j i

Fig. 2 is a top plan view of the device with the lid removed.

Fig. 3 is a cross sectional view of the heater taken on line 33 of Fig.2 and more fully illustrates its interior construction.

3 Fig. 4 is an enlarged side view of a portion of the invention holdingan oil saturated pad and pad holding clamp.

WVhen oil heat is used instead of electric heat to permanently wavehair, it is highly desirable that the oil saturated pads not only be ofuniform and correct temperature when placed on the hair to be waved, butthat sufficient hot pads be available to the operator at all times tocomplete the of the entire head of hair. I have accomplished thisapplication filed-March 21, 1932. Serial No. 600,134.

by my heater as will ciated.

In the drawing I have used the numeral to generally designate thehousing of the in vention having the hinged lid 11. This housing maybeof any shape, size or design. To facilitate its manual movementfromplace to place I haveprovided a handle member 12 on each side asshown in Fig. 1. In the bottom portion of the housing 10 is a drawerwhich I have designated by the numeral 13. The manual opening andclosing of this drawer is facilitated by the knob 14:.

The numeral 15 designates a base member secured inside the housing 10 byany suitable means and positioned just above the drawer 13 as shown inFig. 3. This base member 15 is of slab. construction and may be of anysuitable insulating material such as composition, clay or like. Itsdimensions are such that it completely incloses the bottom portion ofthe housing, providing thereby a compartment for the drawer 13. Thenumeral 16 designates coiled. resistance wire resting in a depression inthe top surface of thebase 15. The numeral 17' designates a detachabletray member resting on the top of the base 15 and. over the resistancewire 16, as shown in Fig. 3. he numerals 18 and 19 designate twoelectric lead wires designed to hem communicationwith the positive andnegative sides of a source of electrical energy; These two lead wiresare connected in the usual manner to the two ends of the resistance wire16. Interimposed in the lead wire 19 is an ordinary thermostat 20 shownin conventional form in Fig. This thermostat 20is positioned adjacentthe side of the tray member 17 and is designed to automatically breakthe electrical circuit when the contents in the tray 1? reaches apredetermined temperature. The numeral 21 designates a liquid inside thetray 17. Although the fluid 21 may be any suitable liquid I recommendoil, due to the fact-that oil does not readily evaporate at hightemperatures. Also interimposed in one of the lead wires 18 and 19 is anordinary manually operated switch 22 positioned for convenience on thefront of the housing 10 as shown in Fig. 1. 9

be hereinafter appre- The numeral 23 designates generally the padsupporting and holding element. This element loosely rests on the uppermarginal edge of the tray 17 and has its bottom extending downwardlysome distance into the tray as shown in Fig. 3.

The numeral 24- designates a plurality of parallel troughs formed in thetop of element 23. These parallel troughs are quite close together andeach have in cross section a curved bottom approximately that of a halfcircle. The bottom of the element 23 conforms to the general outlineof'these troughs 24 to provide a greater heating surface on the bottomof the element 23 and to eliminate undesirable thickness of the element23, which would otherwise interfere with the rapid transfer of heat. Thenumeral 25 designates a thermometer positioned in the central peri tionof the element .23 as shown in Fig. 2.

This thermometer 25 furnishes immediate temperature information to theoperator. The numeral 26 designates insulating material such as asbestosinter-imposed between the housing 10 and the parts 15, 1'7 and 23, asshown in Fig. 3. This sheet insulation 26 prevents the housing 10 frombecoming unduly hot. Similar sheet insulation may also be placed asshownin 3 between the base 15 and the tray 17.

I have designated the v.oil saturated pads.

to be heated by the numeral 27. Each of these pads are embraced andsecured to two hinged shell members 28 and 29 as shown in Fig. 4.. Thesetwo shell members, when in a closed position, are of circularconstruction and as explained in my patent herebefore referred to withthe pads 27 are capable of embracing a winding of hair to be permanentlywaved. The spring 30 normally holds the two shell members 28 and 29 in aclosed position. The numerals 31 and 32 designate two handle memberssecured to the shells 28 and 29 respectively. These hand-le members 31and 32 are used to manually carry the shell members to which they aresecured. They are also used to open the two shell members which isaccomplished by forcing the two handle members toward each other againstthe spring 30.

To use my device it is merely necessary, to place one or more pairs ofshell members 28 and 29, holding the pads 27 into the grooves 24 asshown in Fig.2 and close the switch 22.

33 With the switch 22 closed theresistance wire 16 will become hot whichwill in turn highly heat the oil 21 in the tray 17. vVith the oil 21engaging the bottom corrugations of the element 23, the heat will beevenly tran ferred from the oil 21 to the pads 27 in the grooves 24.With the thermometer 25 show ing sufiicient temperature the pads may beused as desired in the process of permanently waving hair. The grooves24 which conform to the general outline of the shell members 28 and 29,when in a closed position, not only aid in holding the handles 81 and 32in a desirableupright position, but embrace the shell memberssufficiently to successfully transfer heat evenly to the pads 27 Theelement 23 and tray 17 holding the liquids may be lifted directly out ofthe housing 10 for cleaning purposes or for the replenishing of newliquid in the tray 17. The drawer 13 may be used to hold and sterilizecertain equipment used in the permanent waving of-hair.

From the foregoing it will readily be seen that I have provided a verydesirable heater for use in connection with permanent waving equipmentusing the hot oil method.

Some changes may be made in the construction and arrangement-of myimproved oil heater for permanent hair waving equipment, withoutdeparting from the real spirit and purpose of my invention, and it is myintention to cover by my claims any modilied forms of structure or useof mechanical equivalents which may be-reasonably included within theirscope.

I claim: 1. In a device of the class described, a housing, handlemembers on said housing, a drawer in said housing, an electric heatingunit inside said housing designed to be in communication with a sourceof electrical energy, a tray in said housing designed to hold liquid, asupporting member above said tray, a plurality of depressions in the topof said supporting member adapted to receive pads used in the permanentwaving of hair, the bottom of said supporting member conforming to thegeneral outline of said depressions and capable of contacting the liquidin said tray, and a thermostat adjacent said tray for-disconnectingsaidelectric heating unit with said source of electrical energywhen'said tray reaches a predetermined tem perature. I V I 2. In adevice of the class described, a housing, an electric heating unitinside said housing designed to be in communication with a source ofelectrical energy, a drawer in said housingand below said heating unit,a tray in said housing designed to hold liquid and positioned above saidheating unit, a supporting member above said tray, and a plurality ofreceivinggrooves in the topof said supportingmember adapted to receivepads used in the permanent waving of hair.

AN THON G. JOHNSON lib

